Dengue worldwide overview

Overall, 78 countries/territories reported dengue cases between January and March 2026. An overview based on publicly available information from official sources and reports from different regions highlighting trends in different countries/territories is presented below. 

The Americas

Americas In the Americas region, as of week 7 of 2026 (15 February 2026), 299 210 cases have been reported, of which 22% were laboratory-confirmed. According to the WHO PAHO report published on 16 March 2026, the current number of reported cases is 64% fewer than during the same period in 2025 and 57% below the five-year average. While all four serotypes have been reported in the region so far in 2026, their distribution varies across the different countries of PAHO (Report on the epidemiological situation of dengue in the Americas). 

South-East Asia 

According to the WHO SEARO epidemiological bulletins published on 25 February 2026 and 8 March 2026, Sri Lanka, India, Thailand, Bangladesh, Timor-Leste, and Nepal reported dengue cases in February 2026. 

• Sri Lanka, Bangladesh, India, and Thailand reported cases at levels comparable to previous years. Sri Lanka reported 13 760 cases as of 1 March 2026, with a slight decrease in the week 23 February-1 March (1 265 cases) compared to the week 16 22 February (1 487 cases). Bangladesh has reported 1 870 cases in 2026 and as of 8 March. India has reported 6 563 cases and Thailand 3 191 in 2026 and as of 28 February. 
• In Timor-Leste, the increasing trend observed in January 2026, with 1 281 cases, continued in February (2 105 cases). This is a 10-fold increase compared to the number reported in February 2025. 
• Maldives continued reporting increasing case numbers in January 2026 (646 cases) following the trends observed since the end of 2025 (411 cases reported in December and 382 cases reported in November 2025).

Western Pacific Region 

In the WHO Western Pacific Region, dengue cases have been reported by several countries in the reports of 5 and 19 March 2026 (WHO WPRO Dengue Situation Update #741: 5 March 2026, WHO WPRO Dengue SItuatioon Update #742: 19 March 2026). The following trends were highlighted by country: 

• Cambodia: A decreasing trend and week to week fluctuations are observed until the beginning of March with 254 cases reported for the week 2-8 March 2026. Since the beginning of 2026, 4 338 cases have reported compared to 1 392 cases reported for the same period in 2025. 
• China: 94 cases were reported in February 2026, and 93 cases were reported in January 2026. Although there has been a decrease in the monthly cases since December 2025, when 151 cases were reported, the cases reported in January 2026 are 84.3% higher compared to the cases reported in January 2025. 
• Indonesia: the decreasing trend since October 2025 continued in 2026, with 4 383 cases reported in January as of 4 March 2026, and 2 489 cases reported in February, as of 10 March 2026. 
• Laos: Week-to-week fluctuations in case numbers are reported (39 cases were reported the week 16-22 February, 33 the week 23 February-1 March and 39 the week 2-8 March). The 703 cases reported in 2026 as of 8 March represent a 56.9% increase compared to the same period in 2025. 
• Malaysia: 1 116 cases were reported the week 1-7 March and a total of 11 340 cases in 2026 with case trends similar to the ones reported in 2025. 
• Singapore: Cases remain at lower levels compared to previous years with 43 cases reported the week 1-7 March. Overall, 322 cases were reported as of 7 March 2026. 
• Vietnam: 1 856 cases were reported in 28 February-6 March and 27 365 cases have been reported since the start of 2026. The decreasing trends reported in February continue but overall there is a two-fold increase compared with 2025. Most cases in 2026 have been reported from the Southern region (86.6%). 

Africa 

According to the Africa CDC Epidemic Intelligence Report published on 23 March 2026, a total of 658 cases has been reported in the region as of 20 March 2026 from Mali (589), Mauritania (33), Senegal (35) and the Central African Republic (1).

EU/EEA 

No cases have been reported in the EU/EEA, excluding the outermost regions. With regards to EU/EEA outermost regions, cases have been reported by Martinique, Guadeloupe, Réunion and by French Guiana, and an increase in consultations in Mayotte. 

In Martinique, transmission of dengue continues at high levels with week-to-week fluctuations. Twenty-nine confirmed cases were reported the week 15-21 February and 53 confirmed cases the week 22-28 February, according to the Dengue Surveillance Report published on 6 March 2026. In Guadeloupe, according to the same report dengue circulates at low levels since mid-January. In Saint Martin no cases were reported since mid-January 2026 (Dengue aux Antilles. Bulletin du 6 mars 2026). 

In Réunion, 24 cases of dengue have been reported since the beginning of 2026 and as of 1 March 2026, with ten of them reported 9-15 March 2026 and one case had been reported the week before (2-8 March). A cluster of cases has been reported in Saint Leu and had led to an increase in the reported cases the week 9-15 March (Surveillance sanitaire à La Réunion. Bulletin du 20 mars 2026.). In French Guiana, dengue activity remains low, with three cases reported between 9 and 22 February 2026 and one case between 23 February and 8 March 2026 (Surveillance sanitaire en Guyane. Bulletin du 26 février 2026 and Surveillance sanitaire en Guyane. Bulletin du 12 mars 2026.). In Mayotte, there is an increase of 7.7% in week of 9-15 March 2026 in consultations for dengue like syndromes, which should be interpreted with caution given the concurrent circulation of Chikungunya virus disease and leptospirosis (Surveillance sanitaire à Mayotte. Bulletin du 20 mars 2026.).

Global overview 

Since the beginning of 2026, and as of 23 March 2026, over 500 000 cases of dengue and over 100 dengue-related deaths had been reported globally, according to information from publicly available sources. This is a decrease compared to the same period in 2025 (Communicable disease threats report, 22-28 March 2025, week 13).